Finding the Third Proportional to 141,220.50 and 215,139

Step by Step Solution

1. Step 1: Write the proportion equation
   141,220.50 : 215,139 = 215,139 : x
2. Step 2: Convert to fraction form
   141,220.50/215,139 = 215,139/x
3. Step 3: Cross multiply
   141,220.50x = 215,139 × 215,139
4. Step 4: Simplify right side
   141,220.50x = 46,284,789,321
5. Step 5: Solve for x
   x = 46,284,789,321/141,220.50
6. Step 6: Final answer
   x = 327,748.37